Answer 1

console.log(parseInt("5")+5);//returns int

Answer 2

Joel Kronqvist 5.toString() wouldent work friend you need.

var x = 5;
console.log(x.toString());

if your wondering why its beacuse js dosent know what the dot means here as it causes ambiguitys, it could mean decimal point.

a less clear way to prevent this would be to do.

console.log(5..toString()+5); //55

or

console.log(5+""+5) //55

Answer 3

Yeah, use parseInt. If you want to convert it back to a string use toString:
console.log(5.toString());//output: 5 (string)

Answer 4

Thanks, D_Stark .
I thought wtiting just 5 would directly instantiate a number. Had wrong.